Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Interest income:
Loans, including fees	$ 211,343	$ 216,554
Investment securities available for sale	15,257	10,732
Trading account assets	161	154
Mortgage loans held for sale	402	1,706
Federal Reserve Bank balances	527	780
Other earning assets	692	465
Total interest income	228,382	230,391
Interest expense:
Deposits	14,221	16,716
Federal funds purchased and securities sold under repurchase agreements	77	91
Long-term debt	13,570	13,770
Total interest expense	27,868	30,577
Net interest income	200,514	199,814
Provision for loan losses	9,511	35,696
Net interest income after provision for loan losses	191,003	164,118
Non-interest income:
Service charges on deposit accounts	19,214	19,521
Fiduciary and asset management fees	11,033	10,971
Brokerage revenue	6,213	7,594
Mortgage banking income	3,511	6,917
Bankcard fees	7,518	7,064
Investment securities gains, net	1,331	45
Other fee income	4,863	5,487
Decrease in fair value of private equity investments, net	(250)	(257)
Gain on sale of Memphis branches, net	5,789	0
Other non-interest income	10,960	7,379
Total non-interest income	70,182	64,721
Non-interest expense:
Salaries and other personnel expense	93,445	93,917
Net occupancy and equipment expense	26,056	24,167
Third-party services	10,097	9,929
FDIC insurance and other regulatory fees	9,719	8,480
Professional fees	7,677	7,095
Foreclosed real estate expense, net	5,681	10,940
Losses on other loans held for sale, net	2,266	165
Visa Indemnification charge	396	37
Restructuring charges	8,577	4,850
Other operating expenses	20,247	22,706
Total non-interest expense	184,161	182,286
Income before income taxes	77,024	46,553
Income tax expense	28,608	16,979
Net income	48,416	29,574
Dividends and accretion of discount on preferred stock	2,559	14,776
Net income available to common shareholders	$ 45,857	$ 14,798
Net income per common share, basic	$ 0.05	$ 0.02
Net income per common share, diluted	$ 0.05	$ 0.02
Weighted average common shares outstanding, basic	972,522	787,043
Weighted average common shares outstanding, diluted	976,527	910,835